diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/EnhancedTrackService.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/EnhancedTrackService.kt
index 21ee0e7e4..08060f3da 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/EnhancedTrackService.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/EnhancedTrackService.kt
@@ -30,7 +30,7 @@ interface EnhancedTrackService {
     /**
      * Checks whether the provided source/track/manga triplet is from this TrackService
      */
-    fun isTrackFrom(track: Track, manga: Manga, source: Source): Boolean
+    fun isTrackFrom(track: Track, manga: Manga, source: Source?): Boolean
 
     /**
      * Migrates the given track for the manga to the newSource, if possible
diff --git a/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/Komga.kt b/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/Komga.kt
index 03afcb213..b9cb86518 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/Komga.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/data/track/komga/Komga.kt
@@ -105,8 +105,8 @@ class Komga(private val context: Context, id: Int) : TrackService(id), EnhancedT
             null
         }
 
-    override fun isTrackFrom(track: Track, manga: Manga, source: Source): Boolean =
-        accept(source) && track.tracking_url == manga.url
+    override fun isTrackFrom(track: Track, manga: Manga, source: Source?): Boolean =
+        track.tracking_url == manga.url && source?.let { accept(it) } == true
 
     override fun migrateTrack(track: Track, manga: Manga, newSource: Source): Track? =
         if (accept(newSource)) {
diff --git a/app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrationMangaPresenter.kt b/app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrationMangaPresenter.kt
index 6e15d17b2..ceb78812b 100644
--- a/app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrationMangaPresenter.kt
+++ b/app/src/main/java/eu/kanade/tachiyomi/ui/browse/migration/manga/MigrationMangaPresenter.kt
@@ -46,8 +46,8 @@ class MigrationMangaPresenter(
 
     // SY -->
     fun migrateManga(prevManga: Manga, manga: Manga, replace: Boolean) {
-        val prevSource = sourceManager.get(prevManga.source)
         val source = sourceManager.get(manga.source) ?: return
+        val prevSource = sourceManager.get(prevManga.source)
 
         Observable.defer { runAsObservable { source.getChapterList(manga.toMangaInfo()).map { it.toSChapter() } } }.onErrorReturn { emptyList() }
             .doOnNext { migrateMangaInternal(prevSource, source, it, prevManga, manga, replace) }
@@ -105,7 +105,7 @@ class MigrationMangaPresenter(
                     track.manga_id = manga.id!!
 
                     val service = enhancedServices
-                        .firstOrNull { prevSource != null && it.isTrackFrom(track, prevManga, prevSource) }
+                        .firstOrNull { it.isTrackFrom(track, prevManga, prevSource) }
                     if (service != null) service.migrateTrack(track, manga, source)
                     else track
                 }